Energy storage device and energy storage system

Abstract

The energy storage device comprises a first box body, a second box body and a first connecting piece, the first box body comprises a first surface, the first surface is provided with a groove, the groove is sunken towards the interior of the first box body along the first surface, and the second box body and the first box body are suitable for being arranged in the first direction; the first box body comprises a first surface, the first surface is the surface, facing one side of the second box body, in the first box body, the second box body comprises a second surface, the second surface is the surface, close to one side of the first box body, in the second box body, the second surface is provided with a protruding structure, and the protruding structure protrudes in the direction away from the interior of the second box body along the second surface; the protruding structures are suitable for being matched with the grooves to limit the first box body and the second box body, the first connecting pieces are connected to the side faces of the first box body and the second box body, and the first connecting pieces are suitable for limiting the first box body and the second box body, so that when the first box body and the second box body are stacked, positioning can be achieved through the protruding structures and the grooves; and fixation is reinforced through the first connecting piece, and rapid stacking and fixing are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage equipment manufacturing, in particular to an energy storage device and an energy storage system. Background Art

[0002] The research and development of new and renewable energy sources and the search for advanced methods to improve energy utilization have become the primary issues of common concern to the world. For a country like my country, which is a large energy producer and consumer, there is a need for both energy conservation and emission reduction and energy growth to support economic development, which requires the vigorous development of the energy storage industry.

[0003] Battery energy storage is a common type of new energy storage device. It converts electrical energy into chemical energy for storage through chemical batteries, and converts chemical energy into electrical energy for release when needed. Battery energy storage devices have the advantages of small size, light weight, and high storage energy density, which can meet the needs of small power applications.

[0004] In order to increase the energy storage density in a limited space, a common method is to stack the energy storage equipment. However, most of the current energy storage cabinets are stacked by blind plugging. The blind plugging structure has a high manufacturing cost, and the positioning process of this method is inconvenient. It has high requirements on product precision and quality, and the manufacturing cost is high. Utility Model Content

[0005] The utility model aims to provide an energy storage device and an energy storage system to solve the problems of inconvenient positioning process of blind plug-in stacking, high requirements on product precision and quality, and high manufacturing cost.

[0006] In order to achieve the purpose of the utility model, the utility model provides the following technical solutions:

[0007] In a first aspect, the utility model provides an energy storage device, comprising: a first box body, the first box body comprising a first surface, the first surface being provided with a groove, the groove being recessed along the first surface toward the interior of the first box body; and a second box body, the second box body and the first box body being suitable for being arranged along a first direction, the first surface being a surface of the first box body facing the side of the second box body, the second box body comprising a second surface, the second surface being a surface of the second box body close to the side of the first box body, the second surface being provided with a protruding structure, the protruding structure protruding along the second surface in a direction away from the interior of the second box body, the protruding structure being suitable for cooperating with the groove to limit the first box body and the second box body; a first connecting member, the first connecting member being connected to the side surfaces of the first box body and the second box body, the first connecting member being suitable for limiting the first box body and the second box body.

[0008] In one embodiment, the number of the protruding structures and the number of the grooves are both multiple, the multiple grooves are spaced apart near the edge of the first surface, the multiple protruding structures are spaced apart near the edge of the second surface, and the multiple protruding structures and the multiple grooves correspond one to one.

[0009] In one embodiment, the protruding structure and the second box body are an integrated structure.

[0010] In one embodiment, the energy storage device further includes a foot cup, the foot cup is connected to the protruding structure, and the protruding structure cooperates with the groove through the foot cup.

[0011] In one embodiment, the height of the protruding structure protruding from the second surface is A1, and the depth of the groove is A2, wherein 0.6≤A1 / A2≤1.2.

[0012] In one embodiment, the energy storage device further includes a first fastener, and mounting holes are provided on the sides of the first box body and the second box body. The first fastener is connected to the first connecting member and cooperates with the mounting holes of the first box body and the second box body.

[0013] In one embodiment, the first connecting member is electrically connected to both the first box and the second box, and the first box or the second box is suitable for being electrically connected to a ground wire.

[0014] In one embodiment, the energy storage device also includes a second connecting member, the second connecting member includes a first connecting portion and a second connecting portion, the first connecting portion is connected to the second connecting portion and has an angle, the first connecting portion is connected to a surface of the second box body facing toward or away from the first box body, and the second connecting portion is used to connect to a supporting base.

[0015] In one embodiment, at least one side surface of the first box body and the second box body is provided with a gripping member, and the gripping member is suitable for gripping to move.

[0016] In one embodiment, the gripping member comprises: a gripping portion, which is suitable for gripping to move; and a wire harness arranging portion, which is suitable for limiting the position of the wire harness.

[0017] In one embodiment, the gripping member is detachably connected to the first box body and / or the second box body.

[0018] In one embodiment, at least one side of the first box body and the second box body is provided with a protective cover.

[0019] In one embodiment, the second box body also includes a third surface, the third surface is arranged opposite to the second surface, and the third surface is provided with the groove; the energy storage device also includes a third box body, the third box body includes a fourth surface and a fifth surface opposite to each other in the first direction, the fourth surface faces the third surface and is provided with the protruding structure, and the fifth surface is provided with the groove; the third box body is suitable for being arranged on the side of the second box body away from the first box body along the first direction, the groove of the third surface cooperates with the protruding structure of the fourth surface to limit the second box body and the third box body, and the first connecting member is connected between the third box body and the second box body.

[0020] In one embodiment, there are multiple third boxes, and the multiple third boxes are arranged in sequence in the first direction, wherein the groove on the fifth surface of one of the third boxes cooperates with the protruding structure on the fourth surface of another adjacent third box, and the first connecting member is also connected between two adjacent third boxes.

[0021] In a second aspect, the utility model further provides an energy storage system, which includes a plurality of energy storage devices, wherein the plurality of energy storage devices are electrically connected, and the energy storage devices are such as the energy storage devices described in any one of the various embodiments of the first aspect.

[0022] By setting a first box body, a second box body and a first connecting piece, the first box body includes a first surface, the first surface is provided with a groove, the groove is recessed along the first surface toward the inside of the first box body, the second box body and the first box body are suitable for being arranged along a first direction, the first surface is a surface of the first box body facing the second box body, the second box body includes a second surface, the second surface is a surface of the second box body close to the first box body, the second surface is provided with a protruding structure, the protruding structure protrudes along the second surface in a direction away from the inside of the second box body, the protruding structure is suitable for cooperating with the groove to limit the first box body and the second box body, the first connecting piece is connected to the sides of the first box body and the second box body, the first connecting piece is suitable for limiting the first box body and the second box body, so that when the first box body and the second box body are stacked, they can be positioned by the protruding structure and the groove, and strengthened and fixed by the first connecting piece to achieve rapid stacking and fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 is a structural diagram of an energy storage device according to an embodiment;

[0025] Figure 2 is a structural diagram of a third box body of an embodiment;

[0026] Figure 3 This is a structural diagram of an energy storage device of another example.

[0027] Description of reference numerals:

[0028] 100-Energy storage device;

[0029] 10-first box body, 11-first surface, 12-groove, 121-limiting groove, 122-positioning groove, 13-installation hole, 14-clamping piece;

[0030] 20-second box, 21-second surface, 22-protruding structure, 23-third surface, 231-connecting hole;

[0031] 30-first connecting piece, 31-second connecting piece, 311-first connecting portion, 3111-waist hole, 312-second connecting portion, 3121-fixing structure, 313-transition portion;

[0032] 40-foot cup;

[0033] 50-gripping member, 51-gripping portion, 52-wire arrangement portion;

[0034] 60-protective shield;

[0035] 70 - third box, 71 - fourth surface, 72 - fifth surface. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0038] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meaning as those commonly understood by technicians in the technical field of this utility model. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more related listed items.

[0039] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0040] Please refer to Figures 1 to 3 , an embodiment of the utility model provides an energy storage system (not shown), including a battery (not shown), a control system (not shown), a temperature system (not shown) and an energy storage device 100 in the embodiment of the utility model, and the battery is contained in the energy storage device 100. Optionally, the battery is electrically connected to the control system, and the control system is used to control the charging and discharging of the battery and monitor the status information of the battery. Optionally, the control system sends the status information of the battery to the management personnel so that the management personnel can manage the energy storage system. Optionally, the temperature system is used to control the operating temperature of the battery to ensure that the battery is not damaged due to overcooling or overheating. Optionally, the temperature system includes a sensor (not shown), a controller (not shown), a heater (not shown) and a refrigerator (not shown). Optionally, the energy storage device 100 in the embodiment of the utility model is provided with a heat dissipation channel (not shown) so that the heat generated during the operation of the battery cell can be transferred to the outside.

[0041] The energy storage system provided in the embodiment of the utility model realizes charging and discharging, state monitoring and feedback, and temperature control of the battery through the battery, the control system, the temperature system, and the energy storage device 100 in the embodiment of the utility model, thereby improving the practicality of the product, ensuring the stability and safety of the battery, and at the same time simplifying the stacking and fixing structure of the energy storage device 100, thereby realizing the rapid positioning and stacking of the energy storage device 100.

[0042] The energy storage device 100 according to the embodiment of the utility model is described in detail below.

[0043] Please refer to Figure 1 and Figure 3 An embodiment of the utility model provides an energy storage device 100 including a first box body 10 , a second box body 20 and a first connecting member 30 .

[0044] The first box body 10 includes a first surface 11 , and a groove 12 is provided on the first surface 11 . The groove 12 is recessed along the first surface 11 toward the inside of the first box body 10 .

[0045] Optionally, the first box body 10 is made of a material that meets the structural strength requirements, is corrosion-resistant and easy to process, and can be specifically aluminum alloy, iron alloy and fiberglass, etc., without limitation. Optionally, the groove 12 includes a limit groove 121 and a positioning groove 122, and the positioning groove 122 is arranged at one end of the limit groove 121 facing away from the bottom surface, and the aperture of the positioning groove 122 is larger than that of the limit groove 121.

[0046] The second box body 20 and the first box body 10 are suitable for being arranged along a first direction. The first surface 11 is a surface of the first box body 10 facing the second box body 20. The second box body 20 includes a second surface 21. The second surface 21 is a surface of the second box body 20 close to the first box body 10. The second surface 21 is provided with a protruding structure 22. The protruding structure 22 protrudes along the second surface 21 in a direction away from the interior of the second box body 20. The protruding structure 22 is suitable for cooperating with the groove 12 to limit the first box body 10 and the second box body 20.

[0047] Optionally, the first direction may be a vertical direction, a horizontal direction, an inclined direction, etc., without limitation. Optionally, the material used by the second box body 20 is similar to that of the first box body 10, which can be referred to and will not be described in detail. Optionally, the cross-sectional shape of the protruding structure 22 may be rectangular, circular, non-circular, etc., without limitation. Optionally, the material used by the protruding structure 22 is similar to that of the first box body 10, which can be referred to and will not be described in detail.

[0048] Optionally, the aperture of the positioning groove 122 gradually decreases from the first surface 11 toward the inside of the first box body 10 to achieve rapid positioning of the protruding structure 22 and the corresponding groove 12. Optionally, the aperture of the limiting groove 121 is slightly larger than or equal to the outer diameter of the protruding structure 22, so that the protruding structure 22 can abut against the inner wall surface of the limiting groove 121 to achieve fixation of the protruding structure 22. Optionally, the cross-sectional shape of the limiting groove 121 is set corresponding to the cross-sectional shape of the protruding structure 22.

[0049] The first connecting member 30 is connected to the side of the first box body 10 and the second box body 20, and the first connecting member 30 is suitable for limiting the position of the first box body 10 and the second box body 20. Optionally, the first connecting member 30 can be made of a material that meets the structural strength requirements, is corrosion-resistant and easy to process, and can be specifically aluminum, aluminum alloy, magnesium alloy, iron and iron alloy, etc., without limitation. Optionally, the first connecting member 30 and the first box body 10 and the second box body 20 can be connected and fixed by screwing, clamping and welding, etc., without limitation.

[0050] By setting the first box body 10, the second box body 20 and the first connecting member 30, the first box body 10 includes a first surface 11, the first surface 11 is provided with a groove 12, the groove 12 is recessed along the first surface 11 toward the inside of the first box body 10, the second box body 20 and the first box body 10 are suitable for being arranged along the first direction, the first surface 11 is the surface of the first box body 10 facing the side of the second box body 20, the second box body 20 includes a second surface 21, the second surface 21 is the surface of the second box body 20 close to the side of the first box body 10, and the second surface 21 is provided with The protruding structure 22 protrudes along the second surface 21 in a direction away from the interior of the second box body 20. The protruding structure 22 is suitable for cooperating with the groove 12 to limit the first box body 10 and the second box body 20. The first connecting member 30 is connected to the side of the first box body 10 and the second box body 20. The first connecting member 30 is suitable for limiting the first box body 10 and the second box body 20, so that when the first box body 10 and the second box body 20 are stacked, they can be positioned by the protruding structure 22 and the groove 12, and strengthened and fixed by the first connecting member 30, so as to achieve rapid stacking and fixation.

[0051] Please refer to Figure 1 The number of the protruding structures 22 and the number of the grooves 12 are both multiple, the multiple grooves 12 are spaced apart near the edge of the first surface 11, the multiple protruding structures 22 are spaced apart near the edge of the second surface 21, and the multiple protruding structures 22 and the multiple grooves 12 correspond one to one.

[0052] Optionally, a plurality of grooves 12 may be arranged at intervals at the four corners of the first surface 11 to prevent the grooves 12 from abutting against the battery cells, so that the first box 10 has a larger battery cell installation capacity. Optionally, a plurality of protrusion structures 22 may be arranged at the four corners of the second surface 21 correspondingly.

[0053] By setting the number of protruding structures 22 and grooves 12 to be multiple, the multiple grooves 12 are spaced apart near the edge of the first surface 11, and the multiple protruding structures 22 are spaced apart near the edge of the second surface 21, and the multiple protruding structures 22 and the multiple grooves 12 correspond one to one, so that the positioning between the first box body 10 and the second box body 20 is more stable and less likely to rotate, deviate or even detach.

[0054] Please refer to Figure 1 The protruding structure 22 and the second box body 20 are an integrated structure. Optionally, the protruding structure 22 and the second box body 20 can be integrally formed by stamping, casting, welding and forging. Optionally, the groove 12 and the first box body 10 can also be an integrated structure.

[0055] Optionally, by setting the protruding structure 22 and the second box body 20 as an integrated structure, the groove 12 and the first box body 10 can also be an integrated structure, so that the assembly process of the first box body 10 and the second box body 20 is simpler and faster, and there is no need to assemble small parts, which reduces the risk of parts falling off of the first box body 10 and the second box body 20, and speeds up the installation speed of the energy storage device 100.

[0056] Please refer to Figure 1 The energy storage device 100 further includes a foot cup 40, which is connected to the protruding structure 22, and the protruding structure 22 cooperates with the groove 12 through the foot cup 40. Optionally, the foot cup 40 is made of a hard, corrosion-resistant and non-deformable material, specifically rubber, plastic and aluminum alloy, etc., without limitation, so that the protruding structure 22 will not damage the structure of the groove 12 when it extends into the groove 12.

[0057] Optionally, the foot cup 40 and the protruding structure 22 can be connected and fixed by means of clamping, screwing, welding, etc. Optionally, the outer diameter of the foot cup 40 is larger than the outer diameter of the protruding structure 22. Optionally, the foot cup 40 can be made of nylon, plastic, rubber, etc., without limitation.

[0058] By setting the foot cup 40, the foot cup 40 is connected to the protruding structure 22, and the protruding structure 22 cooperates with the groove 12 through the foot cup 40, so that soft contact is achieved between the multiple protruding structures 22 and the groove 12, avoiding the metal part and sharp part of the protruding structure 22 from causing wear to the inner wall and bottom wall of the groove 12.

[0059] Please refer to Figure 2 , the height of the protruding structure 22 protruding from the second surface 21 is A1, and the depth of the groove 12 is A2, wherein 0.6≤A1 / A2≤1.2.

[0060] In one embodiment, 1<A1 / A2≤1.2, so that there is a spacing distance between the adjacent first surfaces 11 and second surfaces 21, thereby preventing damage to the paint surfaces of the first surfaces 11 and the second surfaces 21, avoiding the generation and accumulation of condensed water between the first box body 10 and the second box body 20, causing corrosion to the first box body 10 and the second box body 20, and improving the heat dissipation performance of the first box body 10 and the second box body 20.

[0061] In another embodiment, 0.6≤A1 / A2≤1, so that the first surface 11 and the second surface 21 can be stacked via a connection structure such as a pad and a tray (not shown), so that the connection between the first box body 10 and the second box body 20 is more stable.

[0062] Please refer to Figure 3The energy storage device 100 further includes a first fastener (not shown), and mounting holes 13 are provided on the sides of the first box body 10 and the second box body 20. The first fastener is connected to the first connecting member 30 and cooperates with the mounting holes 13 of the first box body 10 and the second box body 20.

[0063] Optionally, the first fastener may be a bolt, which is connected with the mounting hole 13. Optionally, the first fastener may also be a screw protruding from the side of the first box body 10 and the second box body 20, and the screw is fixed to the first connecting member 30 through a corresponding nut (not shown). Optionally, the material of the first fastener is similar to that of the first connecting member 30, which can be used for reference and will not be described in detail.

[0064] By setting a first fastener, mounting holes 13 are opened on the sides of the first box body 10 and the second box body 20. The first fastener is connected to the first connecting member 30 and cooperates with the mounting holes 13 of the first box body 10 and the second box body 20, so that the installation and disassembly between the first connecting member 30 and the first box body 10 and the second box body 20 are more convenient, the structure is simple, and the manufacturing cost is low.

[0065] Please refer to Figure 3 The first connector 30 is electrically connected to the first box 10 and the second box 20, and the first box 10 or the second box 20 is suitable for being electrically connected to the ground wire. Optionally, the ground wire can be electrically connected to the ground, the wall, the column, etc., without limitation.

[0066] By setting the first connecting member 30 to be electrically conductive with the first box body 10 and the second box body 20, the first box body 10 or the second box body 20 is suitable for being electrically connected to the ground wire, so that the leakage current of the energy storage device 100 can be conducted to the ground, wall or column, preventing the leakage current from causing damage to equipment and personnel.

[0067] Please refer to Figure 1 The energy storage device 100 also includes a second connecting member 31, the second connecting member 31 includes a first connecting portion 311 and a second connecting portion 312, the first connecting portion 311 is connected to the second connecting portion 312 and has an included angle, the first connecting portion 311 is connected to the second surface 21 or the third surface 23 of the second box body 20 facing away from the first box body 10, and the second connecting portion 312 is used to connect to a supporting base (not shown).

[0068] Exemplarily, the second connecting member 31 is connected to the third surface 23, and the third surface 23 is provided with a connecting hole 231, and the connecting hole 231 is used to connect and fix with the first connecting part 311. Optionally, the second connecting part 312 is provided with a fixing structure 3121, and the fixing structure 3121 is used to connect and fix with the supporting base. Optionally, the fixing structure 3121 can be a fixing hole, a fixing groove, a fixing welding point, etc., without limitation. Optionally, the fixing structure 3121 and the supporting base can be connected and fixed by screwing, clamping and welding, etc., without limitation. Optionally, the fixing member can be made of a material that meets the structural strength requirements, is corrosion-resistant and easy to process, and specifically can be aluminum, aluminum alloy, magnesium alloy, iron and iron alloy, etc., without limitation. Optionally, the supporting base can be a wall, a bracket, a supporting platform, etc., without limitation.

[0069] Optionally, the first connecting portion 311 is provided with a waist hole 3111, and the energy storage device 100 further includes a second fastener (not shown), which is inserted into the waist hole 3111 and connected and fixed with the connecting hole 231. Optionally, with the connecting hole 231 as the starting point, the moving distance of the second connecting member 31 along the extending direction of the waist hole 3111 can be 0mm-90mm, specifically 0mm, 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm and 90mm, etc., without limitation. Optionally, the second connecting member 31 can rotate around the axis of the connecting hole 231, and the rotation angle can be 0°-90°, specifically 0°, 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80° and 90°, etc., without limitation. Optionally, the structure of the second fastener is similar to that of the first fastener, and reference can be made thereto, and no further description is given.

[0070] Optionally, the second connecting member 31 further includes a transition portion 313, one end of the transition portion 313 is connected to the first connecting portion 311, and the other end is connected to the second connecting portion 312, and the transition portion 313 is arc-shaped, so that the first connecting portion 311 and the second connecting portion 312 are smoothly connected and have an angle. Optionally, the ends of the first connecting portion 311 and the second connecting portion 312 away from the transition portion 313 are both chamfered, so that the quenching stress can be effectively reduced during heat treatment, and the sharp wall portion causes damage to the energy storage device 100 and personnel.

[0071] By setting a second connecting member 31, the second connecting member 31 includes a first connecting portion 311 and a second connecting portion 312, the first connecting portion 311 is connected to the second connecting portion 312 and has an angle, the first connecting portion 311 is connected to the second surface 21 or the third surface 23 of the second box body 20 facing away from the first box body 10, and the second connecting portion 312 is used to connect to the supporting base, so that the energy storage device 100 can be connected and fixed to the supporting base in a complex environment.

[0072] Please refer to Figure 3 At least one side surface of the first box body 10 and the second box body 20 is provided with a gripping member 50, and the gripping member 50 is suitable for gripping to move.

[0073] By providing a gripping member 50 on at least one side of the first case 10 and the second case 20 , the gripping member 50 is suitable for gripping to move, so that the energy storage device 100 can be moved, stacked and disassembled by means of the gripping member 50 .

[0074] Please refer to Figure 3 The gripping member 50 includes a gripping portion 51 and a harness arranging portion 52. The gripping portion 51 is suitable for gripping to move, and the harness arranging portion 52 is suitable for limiting the position of the harness (not shown). Optionally, the gripping portion 51 can be a handle, or a groove 12 for gripping, etc., without limitation. Optionally, the harness arranging portion 52 can be a harness tube, a cable winder, a hook, etc., without limitation.

[0075] By providing a gripping portion 51 and a harness organizing portion 52, the gripping portion 51 is suitable for gripping for movement, and the harness organizing portion 52 is suitable for limiting the position of the harness. The gripping portion 51 may be a handle, or a groove 12 for gripping, etc., and the harness organizing portion 52 may be a harness tube, a cable winder, a hook, etc., so that the energy storage device 100 can be moved, stacked, and disassembled with the aid of the gripping portion 51, and at the same time, the harness is stored in the harness organizing portion 52, thereby improving the neatness of the appearance of the energy storage device 100 and facilitating installation and maintenance.

[0076] Please refer to Figure 3 The gripping member 50 is detachably connected to the first box body 10 and / or the second box body 20. Optionally, the gripping member 50 and the first box body 10 and / or the second box body 20 may also be an integrated structure.

[0077] By providing a detachable connection between the gripping member 50 and the first box body 10 and / or the second box body 20, the energy storage device 100 can be routed before the gripping member 50 is installed, thereby increasing the operating space for routing and facilitating routing.

[0078] Please refer to Figure 1 and Figure 3 , at least one side of the first box body 10 and the second box body 20 is provided with a protective cover 60. Optionally, the sides of the first box body 10 and the second box body 20 on which the protective cover 60 is installed are both provided with a plurality of clamping members 14, and the protective cover 60 is provided with a corresponding plurality of clamping grooves (not shown), and the plurality of clamping grooves are connected and fixed with the plurality of clamping members 14 in a one-to-one correspondence. Optionally, the clamping members 14 can be bolts, studs, and bosses, etc., without limitation. Optionally, the sides of the first box body 10 and the second box body 20 on which the first connecting member 30 and the gripping member 50 are installed are both provided with a protective cover 60.

[0079] By providing a protective cover 60 on at least one side of the first box body 10 and the second box body 20, the structures on the sides of the first box body 10 and the second box body 20 are isolated from the external environment to prevent the structures from being damaged and leakage.

[0080] Please refer to Figures 1 to 3 , the third surface 23 of the aforementioned second box body 20 is provided with a groove 12. The energy storage device 100 further includes a third box body 70, the third box body 70 includes a fourth surface 71 and a fifth surface 72 opposite to each other in the first direction, the fourth surface 71 faces the third surface 23 and is provided with a protruding structure 22, and the fifth surface 72 is provided with a groove 12. The third box body 70 is suitable for being arranged on a side of the second box body 20 away from the first box body 10 along the first direction, the groove 12 of the third surface 23 cooperates with the protruding structure 22 of the fourth surface 71 to limit the second box body 20 and the third box body 70, and a first connecting member 30 is connected between the third box body 70 and the second box body 20.

[0081] Optionally, the material of the third box 70 is similar to that of the third box 70, which can be referred to and will not be repeated. Optionally, the third box 70 is also provided with a gripping member 50 and a protective cover 60. Optionally, one of the first box 10, the second box 20 and the third box 70 is connected to the ground wire. Optionally, the second connecting member 31 can be connected to the fourth surface 71 or the fifth surface 72 of the third box 70, without limitation.

[0082] By setting the third surface 23 of the second box body 20 and the third box body 70, the third surface 23 is set opposite to the second surface 21, and the third surface 23 is provided with a groove 12. The third box body 70 includes a fourth surface 71 and a fifth surface 72 opposite to each other in the first direction. The fourth surface 71 faces the third surface 23 and is provided with a protruding structure 22. The fifth surface 72 is provided with a groove 12. The third box body 70 is suitable for being arranged on a side of the second box body 20 away from the first box body 10 along the first direction. The groove 12 of the third surface 23 cooperates with the protruding structure 22 of the fourth surface 71 to limit the second box body 20 and the third box body 70. The first connecting member 30 is connected between the third box body 70 and the second box body 20, so that when the third box body 70 is stacked with the second box body 20, it can also be positioned by the protruding structure 22 and the groove 12, and the first connecting member 30 is used to strengthen the fixation and grounding, so as to achieve rapid stacking and fixation, and at the same time improve the power storage capacity of the energy storage device 100.

[0083] Please refer to Figure 3 There are multiple third boxes 70, and the multiple third boxes 70 are arranged in sequence in the first direction. The groove 12 on the fifth surface 72 of one third box 70 matches the protruding structure 22 on the fourth surface 71 of another adjacent third box 70, and a first connecting member 30 is also connected between the two adjacent third boxes 70.

[0084] Optionally, the plurality of third boxes 70 may be provided with a protective cover 60. Optionally, the second connector 31 may be connected to the fourth surface 71 or the fifth surface 72 of the third box 70 with the largest distance from the first box 10, without limitation. Optionally, any one of the first box 10, the second box 20 and the plurality of third boxes 70 is connected to the ground wire.

[0085] By providing a plurality of third boxes 70, the plurality of third boxes 70 are sequentially arranged in the first direction, the groove 12 on the fifth surface 72 of one third box 70 matches the protruding structure 22 on the fourth surface 71 of another adjacent third box 70, and a first connecting member 30 is further connected between two adjacent third boxes 70, so that the power storage capacity of the energy storage device 100 is greatly improved, the output capacity and reliability of the energy storage device 100 are improved, and expansion and management are facilitated.

[0086] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0087] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. An energy storage device, It is characterized in that include: A first box body, the first box body comprising a first surface, the first surface being provided with a groove, the groove being recessed along the first surface toward the inside of the first box body; and A second box, wherein the second box and the first box are adapted to be arranged along a first direction, the first surface is a surface of the first box facing the second box, the second box comprises a second surface, the second surface is a surface of the second box close to the first box, the second surface is provided with a protruding structure, the protruding structure protrudes along the second surface in a direction away from the interior of the second box, and the protruding structure is adapted to cooperate with the groove to limit the first box and the second box; A first connecting member is connected to the side surfaces of the first box body and the second box body, and the first connecting member is suitable for limiting the position of the first box body and the second box body.

2. The energy storage device according to claim 1, It is characterized in that There are multiple protruding structures and multiple grooves, multiple grooves are spaced apart near the edge of the first surface, multiple protruding structures are spaced apart near the edge of the second surface, and multiple protruding structures correspond to multiple grooves one by one.

3. The energy storage device according to claim 1, It is characterized in that The protruding structure and the second box body are an integrated structure.

4. The energy storage device according to claim 1, It is characterized in that The energy storage device further comprises a foot cup, wherein the foot cup is connected to the protruding structure, and the protruding structure cooperates with the groove through the foot cup.

5. The energy storage device according to any one of claims 1 to 4, It is characterized in that The height of the protruding structure protruding from the second surface is A1, and the depth of the groove is A2, wherein 0.6≤A1 / A2≤1.

2.

6. The energy storage device according to any one of claims 1 to 4, It is characterized in that The energy storage device further includes a first fastener. The sides of the first box body and the second box body are both provided with mounting holes. The first fastener is connected to the first connector and is matched with the mounting holes of the first box body and the second box body.

7. The energy storage device according to any one of claims 1 to 4, It is characterized in that The first connecting member is electrically connected to both the first box and the second box, and the first box or the second box is suitable for being electrically connected to a ground wire.

8. The energy storage device according to any one of claims 1 to 4, It is characterized in that The energy storage device also includes a second connecting member, which includes a first connecting portion and a second connecting portion, the first connecting portion is connected to the second connecting portion and has an included angle, the first connecting portion is connected to a surface of the second box body facing toward or away from the first box body, and the second connecting portion is used to connect to a supporting base.

9. The energy storage device according to any one of claims 1 to 4, It is characterized in that At least one side surface of the first box body and the second box body is provided with a gripping member, and the gripping member is suitable for gripping for movement.

10. The energy storage device according to claim 9, It is characterized in that The gripping member comprises: a gripping portion adapted to grip for movement; A wire harness arranging portion, wherein the wire harness arranging portion is suitable for limiting the position of the wire harness.

11. The energy storage device according to claim 9, It is characterized in that The gripping member is detachably connected to the first box body and / or the second box body.

12. The energy storage device according to claim 9, It is characterized in that At least one side surface of the first box body and the second box body is provided with a protective cover.

13. The energy storage device according to any one of claims 1 to 12, It is characterized in that The second housing further includes a third surface, the third surface is disposed opposite to the second surface, and the third surface is provided with the groove; the energy storage device further includes a third housing, the third housing includes a fourth surface and a fifth surface opposite to each other in the first direction, the fourth surface faces the third surface and is provided with the protruding structure, and the fifth surface is provided with the groove; The third box is suitable for being arranged along the first direction on a side of the second box away from the first box, the groove on the third surface cooperates with the protruding structure on the fourth surface to limit the second box and the third box, and the first connecting member is connected between the third box and the second box.

14. The energy storage device according to claim 13, It is characterized in that There are multiple third boxes, and the multiple third boxes are arranged in sequence in the first direction, wherein the groove on the fifth surface of one of the third boxes matches the protruding structure on the fourth surface of another adjacent third box, and the first connecting member is also connected between two adjacent third boxes.

15. An energy storage system, It is characterized in that It comprises a plurality of energy storage devices, wherein the plurality of energy storage devices are electrically connected, and the energy storage devices are the energy storage devices as claimed in any one of claims 1 to 14.

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